As stated in the title, this machine is perfect at the job it was designed for. Too many of these negative reviewers bash the runtime of the unit. To that, I say buy a plugin model - you're using this for the wrong tasks.
A small, cordless vacuum is meant for quick tasks around the house. Like the kids dropping crumbs on the floor, or some dry dirt from shoes near the front door. And no, not saw dust, fireplace ashes, or talcum powder. Particles that small is the reason why industrial companies make big, expensive machines to handle that type of material.
There's an old adage........the right tool for the job. Well, stick to that principle and this is the perfect tool for the types of jobs for which it was designed. Just because you can go out and buy the most expensive bicycle on the market, doesn't mean you should expect it to traverse coast-to-coast as well as an airplane.
Good job once again, Dyson. This is my second vacuum and I still marvel at the designs. Excellent engineering.